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3 years ago

Help ASAP please and thanks

Mathematics

2 answers:

saul85 [17]3 years ago

4 0

1) 0.1591035847
2) a to the 3rd power (3+5a)
3)3/a to the 22nd power

Usimov [2.4K]3 years ago

3 0

1) 0.1591035847
2) a to the 3rd power (3+5a)
3)3/a to the 22nd power

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Triangle DEF is a right triangle. If FE=5 and DF=13, find DE.

Nadya [2.5K]

Answer:

Step-by-step explanation:

I am amusing you are looking for the hypotenuse since this is middle school.

If you have the legs and are looking for the hypotenuse you use the Pythagorean Theorem $a^{2} + b^{2} = c^{2}$

The legs are a and b, and the hypotenuse is c

The work would look like this

$13^{2} + 5^{2} = c^{2} \\169+25= c^{2} \\194= c^{2} \\\sqrt{194} = \sqrt{c^{2} } \\13.9283883... = c$

extra notes

I rounded to 13
If you didn;t know you cancles exponents with roots

so the $c^{2}$ is cancled by aka $\sqrt{c}$

Hope this helped :)

4 0

4 years ago

Susan drove 4 hours. Her average speed was 60 mph. Finish the chart below to give her an average speed of 60 mph.

Keith_Richards [23]

Answer:

Its 50

Step-by-step explanation:

60 times 4 it gives you 240.

Now minus all the numbers on the table like this

240 - 55 - 70 - 65 which equals to 50

240 would be the miles

3 0

2 years ago

Find sin 0, where is the angle shown. Give an exact value, not a decimal approximation.

Nata [24]

Answer:

$\displaystyle \sin\theta=\frac{12}{13}$

Step-by-step explanation:

Recall that in a right triangle, sine is the ratio of the opposite side to the hypotenuse:

$\displaystyle \sin\theta=\frac{\text{opposite}}{\text{hypotenuse}}$

We are actually not given the opposite side in this case. However, since we know the hypotenuse and the adjacent side, we can use the Pythagorean Theorem to find the opposite side. So:

$a^2+b^2=c^2$

Let a be the adjacent side and b be the opposite side. c will be the hypotenuse.

Substitute:

$(5)^2+b^2=(13)^2$

Solve for b:

$b=\sqrt{169-25}=\sqrt{144}=12$

So, the opposite side measures 12.

Then sine will be:

$\displaystyle \sin\theta=\frac{12}{13}$

3 0

3 years ago

Help me on this PLEASE i dont have much time What is the simplified form of this expression? 18 ÷ 6 + 8 × 7 – 12 + 8 × 2

LuckyWell [14K]

Hello using PEMDAS I came up with 63

division and multiplication first then add and subtract leaving you with 63

4 0

3 years ago

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You invest $350 in an account with an interest rate of 1.2% compounded continuously. How much money would be in the account afte

kozerog [31]

Change 1.2%into decimal you will get 0.012
then multiply 350 by 0.012 you got the answer
then add the 0.012 with the 10 you will get 10.012
at the end round your answer to the whole number

5 0

3 years ago

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